package com.heima.admin.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.core.toolkit.Wrappers;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.heima.admin.mapper.ChannelMapper;
import com.heima.admin.service.ChannelService;
import com.heima.model.common.dtos.ChannelDTO;
import com.heima.model.common.dtos.PageResponseResult;
import com.heima.model.common.dtos.ResponseResult;
import com.heima.model.common.enums.AppHttpCodeEnum;
import com.heima.model.common.pojos.AdChannel;
import org.apache.commons.lang3.StringUtils;
import org.springframework.stereotype.Service;

import java.util.Date;

/**
 * @BelongsProject: heima-leadnews
 * @BelongsPackage: com.heima.admin.service.impl
 * @Author: WangYue
 * @CreateTime: 2022-07-25  21:25
 * @Description:
 * @Version: 1.0
 */
@Service
public class ChannelServiceImpl extends ServiceImpl<ChannelMapper, AdChannel> implements ChannelService {
    @Override
    public PageResponseResult findPageQuery(ChannelDTO channelDTO) {
//        参数校验代码
        channelDTO.checkParam();
//        分页查询
        Page<AdChannel> page = new Page<>(channelDTO.getPage(), channelDTO.getSize());
//                其它查询条件
        LambdaQueryWrapper<AdChannel> wrapper=new LambdaQueryWrapper<>();
//                搜索的值是否为空
       if (StringUtils.isNotBlank(channelDTO.getName())){
           wrapper.like(AdChannel::getName,channelDTO.getName());
       }
//                状态是否为空
        if (channelDTO.getStatus()!=null){
            wrapper.eq(AdChannel::getStatus,channelDTO.getStatus());
        }
//        按照ord升序排序  11:38
        wrapper.orderByAsc(AdChannel::getOrd);
//        执行查询操作
        IPage<AdChannel> page1 = this.page(page,wrapper);
//        封装成pageResponse
        return new PageResponseResult(channelDTO.getPage(), channelDTO.getSize(),page1.getTotal(),page1.getRecords() );
    }

    @Override
    public ResponseResult insert(AdChannel adChannel) {
// 1 参数校验
        if (adChannel == null || StringUtils.isBlank(adChannel.getName())) {
            return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_REQUIRE);
        }
        // 2 判断该频道是否存在

        int count = this.count(Wrappers.<AdChannel>lambdaQuery()
                .eq(AdChannel::getName, adChannel.getName()));
        if(count > 0){
            return ResponseResult.errorResult(AppHttpCodeEnum.DATA_EXIST,"该频道已存在");
        }
        // 3 执行新增
        adChannel.setCreatedTime(new Date());
        save(adChannel);
        // 4 返回结果
        return ResponseResult.okResult();
    }

    @Override
    public ResponseResult update(AdChannel adChannel) {
        //1 参数校验
        if (adChannel == null || adChannel.getId() == null) {
            return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_INVALID);
        }
        //2 执行修改
        AdChannel channel = getById(adChannel.getId());
        if (channel == null) {
            return ResponseResult.errorResult(AppHttpCodeEnum.DATA_NOT_EXIST,"频道信息不存在");
        }
        //3. 校验名称唯一性
        if(StringUtils.isNotBlank(adChannel.getName())
                &&
                !adChannel.getName().equals(channel.getName())){
            int count = this.count(Wrappers.<AdChannel>lambdaQuery()
                    .eq(AdChannel::getName, adChannel.getName()));
            if(count > 0){
                return ResponseResult.errorResult(AppHttpCodeEnum.DATA_EXIST,"该频道已存在");
            }
        }
        updateById(adChannel);
        //4 返回结果
        return ResponseResult.okResult();
    }
    @Override
    public ResponseResult deleteById(Integer id) {
        //1.检查参数
        if(id == null){
            return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_INVALID);
        }
        //2.判断当前频道是否存在 和 是否有效
        AdChannel adChannel = getById(id);
        if(adChannel==null){
            return ResponseResult.errorResult(AppHttpCodeEnum.DATA_NOT_EXIST);
        }
        // 启用状态下不能删除
        if (adChannel.getStatus()) {
            return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_REQUIRE);
        }

        //3.删除频道
        removeById(id);
        return ResponseResult.okResult(AppHttpCodeEnum.SUCCESS);
    }
}
